<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="btnFn(index)">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="item.id">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delFn(index)">删除</button>
            <button @click="editFn(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        {
          id: 1,
          name: "Tom",
          age: 19,
          sex: "男",
        },
        {
          id: 2,
          name: "John",
          age: 18,
          sex: "女",
        },
      ],
      name: "",
      age: "",
      sex: "",
      flag: true,
      index: '',
    };
  },
  methods: {
       
      btnFn(index) {
      if (this.flag) {
        if(this.name.trim() !== '' && this.age !== '' && this.sex !== '') {
          this.arr.push({
          id: this.arr.length ? this.arr.at(-1).id + 1 : 1,
          name: this.name,
          age: this.age,
          sex: this.sex,
        })
       }else{
         return alert('请输入完整信息')
       } 
      }if(this.flag === false) {
         this.arr[index] = {
           id : this.id,
           name : this.name,
           age : this.age,
           sex : this.sex,
         }
       }
      this.name = "";
      this.age = "";
      this.sex = "";
      this.flag = true
    },
    delFn(index) {
      this.arr.splice(index, 1)
    },
    editFn(index) {
      this.name = this.arr[index].name
      this.age = this.arr[index].age
      this.sex = this.arr[index].sex
      this.flag = false
      this.index = index
    }
  },
};
</script>
